cheers mate - aye best to keep yourself right. I know there have been two old pc fanmade games - one called dan dare by Ovine (c64 one) and another called can care, which was a remake of the speccy one, but can't find it anywhere. Be a shame if never released - good luck - Should add, rather than charcging a fee (which would perhaps stop you getting permission) you could do a donation to 'buy you a coffee' etc. Personally think most folk would donate anyway.
looks fire anyway mate - wish I had your talent, I'd do so many old remakes, just tweaking them like you are for a modern look (and no colour clash lol) but keeping that 'feel' in the asthetics and adding modern sound effects. Somethings like speccy versions of Exploding fist, etc. Anyway back on topic, hope you get to finish it. cheers